Author/Authors :
Tan، نويسنده , , Chengjian and Di، نويسنده , , Yingtong and Wang، نويسنده , , Yuehu and Wang، نويسنده , , Ye and Mu، نويسنده , , Shuzhen and Gao، نويسنده , , Shi-Suo and Zhang، نويسنده , , Yu and Kong، نويسنده , , Ningchuan and He، نويسنده , , Hongping and Zhang، نويسنده , , Jianxin and Fang، نويسنده , , Xin and Li، نويسنده , , Chunshun and Lu، نويسنده , , Yang and Hao، نويسنده , , Xiaojiang، نويسنده ,
Abstract :
Oldhamine A, a novel alkaloid with an unusual cyclopentadienyl anion in the fused-pentacyclic skeleton was isolated from the twigs of Daphniphyllum oldhami. The structure of oldhamine A was elucidated based on the spectroscopic data and the single-crystal X-ray diffraction crystallography. It is the first X-ray diffraction of the Daphniphyllum alkaloids with nitrogen-containing two pentacyclic rings. The inter-conversion between cyclopentadienyl anion and conjugated enolic unit was also conducted.
Keywords :
Nortriterpenoid alkaloid , Daphniphyllaceae , Daphniphyllum oldhami , Oldhamine A , Internal salt , Cyclopentadienyl anion
